My personal list of things that will never happen but if they did i would fap myself to death over awesomness of Aurora ( even more than i do now ).
In my case it would be addition of "crazy science" which can be either researched or found. Some examples include:
1. Atmosphere remover, which creates a wormhole to "somewhere" and suck atmosphere out of the body allowing you to easily colonies and terraform Venusian planets (for balance reasons it would be one use item).
2. Gas giant ignitor, which can turn a gas giant or a brown dwarf into a miniature star, allowing you to colonize and terraform their moons that were far too cold previously (always a one use item).
3. Link destroyer/creator that would allow you to destroy an inconvenient jump connection (or to create a convenient one) without resorting to SMing.
4. Superscale habitats like McKendree cylinders, Bank's Orbitals or maybe small (3mln kilometers) ringworlds around those useless white dwarfs.
5. Matter transmuter that would would be deployed close to a star (in the same way fuel harvesters are deployed around gas giants) manufacturing TN elements for free.
Other things I'd also like to see, but are unlikely to be added are:
1. Ability to make a custom star system. Recently I play much less campaigns with all powers starting on Earth and more scenarios with several powers starting in different star systems and getting a reasonable one via random generation is a friggin' nightmare, especially when you want a somewhat specific system for RP purposes.
2. More ways to generate revenue, preferably though some kind of ship component (like solar power satellites).
3. Revamp of genetic engineering. It's a cool concept but through the implementation it's extremely rarely used. It might have been different if my games were actually long, but I rarely get far enough to be able to spend large amounts of research into genetic modifications which are pretty useless on low levels. And if I try to devote myself to the research due to RP reasons, the nation that does so falls heavily behind. So much wasted potential qq.
4. Revamp of underground infrastructure. Another cool concept that is simply impractical due to cost vs. reward ratio.